var path = require('path');
var webpack = require('webpack');
var HtmlwebpackPlugin = require('html-webpack-plugin');
//定义了一些文件夹的路径
var ROOT_PATH = path.resolve(__dirname);
var APP_PATH = path.resolve(ROOT_PATH, 'app');
var BUILD_PATH = path.resolve(ROOT_PATH, 'build');

module.exports = {
    //项目的文件夹 可以直接用文件夹名称 默认会找index.js 也可以确定是哪个文件名字
    entry: {
        app: path.resolve(APP_PATH, 'index.js'),
        //添加要打包在vendors里面的库
        vendors: ['jquery', 'moment', 'lodash']
    },
    //输出的文件名 合并以后的js会命名为bundle.js
    output: {
        path: BUILD_PATH,
        filename: '[name].js'
    },
    //添加我们的插件 会自动生成一个html文件
    plugins: [
        //这个使用uglifyJs压缩你的js代码
        new webpack.optimize.UglifyJsPlugin({minimize: true}),
        //把入口文件里面的数组打包成verdors.js
        new webpack.optimize.CommonsChunkPlugin('vendors', 'vendors.js'),
        new HtmlwebpackPlugin({
            title: 'Hello World app'
        })
    ],
    devServer: {
        historyApiFallback: true,
        hot: true,
        inline: true,
        progress: true
    },
    // devtool: 'eval-source-map', //启用source-map
    module: {
        loaders: [
            {
                test: /\.less$/,
                loader: "style!css?sourceMap!less?sourceMap"
            }
        ]
    }
};